The calculated distance (air line) between Štětí and Ústí nad Labem is approximately 21 miles respectively 33 kilometers.
By car or train, the actual journey to Ústí nad Labem is certainly longer, as only the direct route (as the crow flies) between Štětí and Ústí nad Labem has been calculated here.
Air line (approximately)
33 kilometers
18 nautical miles